čeoni

1. (of a collision, part) head-on; front
   Na auto-putu se dogodio čeoni sudar dva automobila. — There was a head-on collision between two cars on the motorway.
   Od kamenčića je napuklo čeono staklo. — The windscreen cracked from a small stone.
2. (in anatomy) frontal
   Pri padu je povredio čeonu kost. — He injured his frontal bone in the fall.

Most often met in čeoni sudar "head-on collision" and čeono staklo "windscreen".